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megafan
Joined: 28 May 2009
Last visit: 15 Oct 2017
Posts: 137
Given Kudos: 91
Location: United States
Concentration: Strategy, General Management
Schools: Stern PT Fall'18 Booth PT '18
GMAT Date: 03-22-2013
GPA: 3.57
WE:Information Technology (Consulting)
04 Mar 2013, 08:05
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D
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
84% (02:04) correct
16%
(02:34)
wrong
based on 256
sessions
History
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Result
Not Attempted Yet
The ratio, by volume, of bleach to detergent to water in a certain solution is 2 : 40 : 100. The solution will be altered so that the ratio of bleach to detergent is tripled while the ratio of detergent to water is halved. If the altered solution will contain 300 liters of water, how many liters of detergent will it contain?
(A) 9
(B) 20
(C) 30
(D) 60
(E) 90
Source: Gmat Hacks 1800
(A) 9
(B) 20
(C) 30
(D) 60
(E) 90
Source: Gmat Hacks 1800
04 Mar 2013, 08:16
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megafan
B:D:W = 2:40:100
Bnew / Dnew = (1/3)*(2/40) = (1/60)
Dnew / Wnew = (1/2)*(40/100) = (1/5)
Wnew = 300
Dnew = Wnew/5 = 300/5 = 60
So, answer will be D
hope it helps!
04 Mar 2013, 08:35
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megafan
Given ratio: 2:40:100 = 1:20:50. The new ratio b/w bleach to detergent: 3:20. The new ratio b/w detergent to water : 1:5. = 20:100
Thus, the new ratio is : 3:20:100. Thus for 100 litres, we have 20 litres of detergent. For 300 litres, we would have \(20*3\) = 60 litres.
D.
